SBC 400

[ssn696]

I just found an uncut 400 block. The one in my coupe was the first engine I ever built - though I had the machine shop do most of it when they balanced the rotating assembly. In 1992, that was less common. After 80K #1 cylinder cracked I had mud in the radiator. I had a local machine shop measure the other seven cylinders and they were still within tolerance on the 0.030 overbore, so I had them sleeve #1, since the forged pistons were still good. The machinist tells me 400s have a lot of nickel, and it takes a long time to bore them. With luck, the sleeve will hold. If not, I have another block I can use if the rotating assembly isn't mangled in the process.

 

[SoFloG]

You mean my 500hp 383?

Yea you don't need it

 

[ZZ4CutlaSS]

This 406 is going to be my spare engine. I will end up using most parts of my 383 if i blow her up. I haven't been all that nice to her....couple races I spun her to 7k to play catch up. I would feel guilty if I sold her just being honest.

 

[Motor City Monte]

Ihave a 85 Monte 406 stock crank and rods11:1 trw flat top pistons edelbrock rpm preformers and a 555 lift comp cam. 800 holly.
was gonna do a bunch of up grades so i talked to the owner of Thompson Automitive for over an hour while getting a tour of the shop which he shares with lingenfelter. He also agress that the four bolt main is highly over rated. Says a 2 bolt main can handle up 700 hp.I myself am getting ready to pull my motor and do a crate i saw on blue print engines.Put a 9"ford rearend in it with a 456 gear and took it to Milan and ran a 12.20.
Love my 406,but just have a need for more speed." selling the long block if anybodys intrested. Just posted it today. I also have a bare block sbc400 with crank and balancer. If your looking.

 

[406 Monte]

Back when I was dirt track racing I had 2 406's, 1 had 4 seasons on it and the other 3. Both were basically the same engine, stock crank chamfered journals, stock polished 5.7 rods w/arp bolts, heavy forged trw 13.5:1 domed pistons, sportsman II heads. Never had an issue with either, love these sb's.
Found two 509 blocks can't wait to get one built and in the monte!

 

[Mikej89]

Sell me your old motor! This is similar to my next build; destroked 400.

377; 400 with 350 crank? I'm surprised more people don't build those... Almost as big as a 383 but will rev like a 350, right?

 

[SoFloG]

377; 400 with 350 crank? I'm surprised more people don't build those... Almost as big as a 383 but will rev like a 350, right?

Yep... extra displacement with less stroke, and i believe its a direct drop in, cant remember if any mod has tobe done.